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The fractions of reflection effect systems detected in different subclasses of hot subdwarfs

文献类型：期刊论文

作者He RJ(贺锐杰)2,3; Meng XC(孟祥存)3; Lei, Zhenxin1,4
刊名Monthly Notices of the Royal Astronomical Society
出版日期2025-11-01
卷号543期号:3页码:2243-2254
关键词binaries: genera binaries: visual subdwarfs
ISSN号0035-8711
DOI10.1093/mnras/staf1612
产权排序第1完成单位
文献子类Journal article (JA) -
英文摘要Hot subdwarfs with close low-mass M-type or brown dwarf companions usually show the reflection effect and often also eclipses. Through inspecting the light variations, we estimate the fractions of reflection effect systems detected in different subclasses of hot subdwarfs and constrain their possible formation channels. We noticed that none of the helium-rich hot subdwarfs were found with the reflection effect. Most of them might form through the merger channel. About 13 per cent of the He-poor hot subdwarfs on the extreme horizontal branch (EHB) with 25 000-33 000 K are discovered with the reflection effect. Nevertheless, the cooler hot subdwarfs located on the top of the EHB, those grouped on the bottom of the EHB, and those located above the EHB with 45 000-75 000 K exhibit lower fractions of reflection effect systems of about 2 per cent. These three subclasses of hot subdwarfs might contain higher fractions of single stars. Hot subdwarfs below the EHB also show a low fraction of reflection effect systems. They might have a higher fraction of stars with close white dwarf companions. A similar fraction of reflection effect systems to those on the EHB with 25 000-33 000 K is found in hot subdwarfs located above the EHB with 35 000-45 000 K. We also discovered that hot subdwarfs close to the Galactic plane might have a higher fraction of stars with the reflection effect than those at higher latitudes. © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
资助项目N/A
语种英语
WOS记录号WOS:001589220000001
资助机构N/A
源URL[http://ir.ynao.ac.cn/handle/114a53/28638]  
专题云南天文台_大样本恒星演化研究组
作者单位1.Key Laboratory of Stars and Interstellar Medium, Xiangtan University, Xiangtan, 411105, China;
2.University of Chinese Academy of Sciences, Beijing, 100049, China;
3.International Centre of Supernovae (ICESUN), Yunnan Key Laboratory of Supernova Research, Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming, 650216, China;
4.Physics Department, Xiangtan University, Xiangtan, 411105, China
推荐引用方式
GB/T 7714		 He RJ,Meng XC,Lei, Zhenxin. The fractions of reflection effect systems detected in different subclasses of hot subdwarfs[J]. Monthly Notices of the Royal Astronomical Society,2025,543(3):2243-2254.
APA 贺锐杰,孟祥存,&Lei, Zhenxin.(2025).The fractions of reflection effect systems detected in different subclasses of hot subdwarfs.Monthly Notices of the Royal Astronomical Society,543(3),2243-2254.
MLA 贺锐杰,et al."The fractions of reflection effect systems detected in different subclasses of hot subdwarfs".Monthly Notices of the Royal Astronomical Society 543.3(2025):2243-2254.

入库方式： OAI收割

来源：云南天文台

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